Re: [CAD_CAM_EDM_DRO] Re: all-thread question

----- Original Message -----
From: "Raymond Heckert" <jnr@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Monday, March 11, 2002 12:11 PM
Subject: Re: [CAD_CAM_EDM_DRO] Re: all-thread question


> Funny you should mention the Acme 1 - 5 tap. I have for some time been
> thinking of using a long Acme-threaded rod as a "rack", then cutting a
> "pinion" gear, using an Acme tap as a "hob". Anyways, I just got a
> Wholesale Tool catalog the other day, and ZAP! There on page 806, I could
> get 12 ft of 1-5 Acme rod for $37.80 (US)/ea. The Tap is only $89.95. So,
> 3 rods (one cut into two 6 ft pieces), and 8 gears, would make an approx 4
> ft x 10 ft drive setup for the CNC plasma cutting table I need! By hobbing
> the gear, with a geared-drive, the resulting teeth should approximate the
> involute tooth form that is desirable for rolling contact. (The finished
> gear would look a'kin to a ring gear in a worm-drive). I'll just have the
> gears roll on the "rack". I'll have to figure a way to secure the threaded
> rod straight & flat. And careful to match the rods as closely as possible.
> Should aught to yield a table capable of +/- >.015"; well enough accuracy
> for plasma cutting, eh? If I do go that way, I'll let you know... perhaps
> I'll make the Delrin "nuts" for you, if you can't find a different way.
>
> Ray Hex
>
> p.s. Best of luck in your project!
>
> ----------
> > From: Russ Revels <n4ft@...>
>
> > I remember someone mentioning a while back that they had made nuts from
> > delrin. Is there a tap for acme 1 x 5? Or is this something that would
> > have to be done on a lathe? I am not familiar with the metal working
> > machines all of my tools are for wood. Is anyone aware of a source of
> delrin
> > or uhmw nuts that would work on a small router table setup?
> >
> > Thanks again,
> >
> > Russ N4FT
>
>
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